What is a Solution?

It is a homogeneous mixture of 2 or more substances

 

Example

  • If we dissolve salt in water , it forms a solution
  • Here, Salt and Water are called components of the solution
  • Water is called Solvent and Salt is called Solute of a solution

 

Salt and Water Solution - Teachoo.png

Properties of a Solution

  • It is Homogeneous Mixture -
    It is a mixture in which different substances are completely and uniformly mixed together , it is difficult to distinguish different substances from each other.

 

  • Particles of the solution are very small - 
    They are less than 1 nm (10 -9 meter) in diameter. These are so small that they can't be seen by naked eyes

 

  • Particles of Solution do not scatter a beam of light -
    If light passes through a solution, the particles of the solution don't scatter it; they do not show Tyndall Effect.

 

  • Solute Particles cannot be separated by filtration -
    Solute particles do not settle down. Hence, we can't use filter to separate them

 

Is Solution only of One Liquid and One Solid?

No,

Solution can contain any state of matter

  • Gas in Liquid Solution - Aerated Drinks (Cold drinks) contain carbon dioxide (gas) as solute and flavoured water (liquid) as solvent

 

  • Liquid in Liquid Solution - Ethyl Alcohol in Water

 

  • Gas in Gas Solution - Air is also a solution . Main components are Nitrogen and Oxygen ( Other components are present in lesser quantities)

 

  • Solid in Liquid Solution
    • Solution of Salt in Water (Water is solvent, Salt is solute)
    • Solution of Sugar in Water (Water is solvent, Sugar is solute)
    • Solution of Iodine in Alcohol (Alcohol is solvent,Iodine is Solute) - Also called tincture of Iodine
  1. Class 9
  2. Chapter 2 Class 9 - Is Matter Around Us Pure (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo